Cisco Router: block ping from internet

Let say we have a router , it’s connected to internet via interface Fa0/1.  For security reason, we don’t want internet use to ping our router. We need to disable icmp , this could be done through access list.

Router#conf t
Router(config)#ip access-list extended acl-internet-in
Router(config)#deny icmp any any echo
Router(config)#permit ip any any   

Then we need to apply this access list to our internet interface : Fa/01

Router#conf t
Router(config)#int fa0/1
Router(config)#ip access-list acl-internet-in in 


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